Magnitude 3.3, Sat May 10 2025 2:04 PM


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Origin


PublicID 2025p348883
UTC Time 2025-05-10T02:04:48Z
Latitude -34.72 (± 48.7 km)
Longitude 178.61 (± 75.9 km)
Depth 273 km (± 65 km)
Depth Type free
Earth Model iasp91
Used Phase Count 10
Used Station Count 9
Standard Error 0.36 (s)
Azimuthal Gap 344.41 (degrees)
Minimum Distance 3.09 (degrees)

Magnitudes


Type Magnitude Station Count
Preferred (MLv) 3.3  
MLv 3.3 1
M 3.3 1

GeoNet combines magnitudes into a summary magnitude, M, which consists of a weighted average of the individual magnitudes and attempts to be a best possible compromise between all magnitudes for a range of earthquake sizes. Summary magnitude for GeoNet is then defined as:

M = (2 * MLv + (0.4 * number_of stations(Mw(mB)) - 1) * Mw(mB)) / (2 + (0.4 * number_of_stations(Mw(mB)) - 1))

Where MLv is local magnitude calculated on the vertical component and Mw(mB) is a Mw estimation based of mB by Bormann and Saul (2008).

Origin Map


Map of New Zealand.

Map showing stations with picks used to locate the earthquake. Stations with picks that have a zero weight in the solution are shown as small grey circles. Those with a higher weight are shown as larger circles. The quake is shown by the largest circle.

Pick Residuals


-2.0-1.00.01.02.0residual (s)0123456Distance (degrees)Pick Residuals

Station Magnitudes (MLv)


0.01.02.03.04.0MagnitudeDistance (degrees)Station Magnitudes (MLv)

Magnitude Residuals (MLv)


-1.00.01.0ResidualDistance (degrees)Magnitude Residuals (MLv)